[ABAP] Systemnachricht an User senden

CALL FUNCTION 'TH_POPUP'
  EXPORTING
    client         = sy-mandt " kann auch freigelassen werden
    user           = sy-uname
    message        = 'Heute werden es über 30°C draußen.'
*   MESSAGE_LEN    = 0
*   CUT_BLANKS     = ' '
  EXCEPTIONS
    user_not_found = 1
    OTHERS         = 2.

IF sy-subrc NE 0.
  MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.